It’s “common knowledge”—and the scare quotes should be a warning—that the sun is an average star.

Still in its original galaxy, a rare holdout from the second generation of stars sheds new light on the origins of the elements—and how massive supernovae reshaped the cosmos ...

A novel theory suggests that the current expansion rate of the universe is not fixed, but was in fact quite different in the ...

Dimensions beyond the four we’re familiar with could solve a host of problems in physics and cosmology. Columnist Leah Crane ...

Cosmic voids may seem like the emptiest places in the universe, stripped of matter, radiation, and even dark matter. But they’re far from nothing. Even in these vast empty regions, the fundamental ...

The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

The interactive online map, created using data from NASA's James Webb Space Telescope, details some 800,000 galaxies across a vast cosmic distance. Scrolling and zooming in can take users some 13.5 ...

Astronomers have uncovered a hidden cosmic web of galaxies and gas by mapping hydrogen light from the early universe.

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.